Angle-Dependent Magnetoresistance Oscillations and Charge Density Wave in the Organic Conductor \alpha-(BEDT-TTF)
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概要
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We have performed full stereographic study on angle-dependent magnetoresistance oscillations (AMROs) in the layered organic conductor, \alpha-(BEDT-TTF)<inf>2</inf>KHg(SCN)<inf>4</inf>, which shows a charge density wave (CDW) transition at T_{\text{c}}. AMROs originating from normal Fermi surfaces (FSs) and reconstructed ones appear above T_{\text{c}} and much below T_{\text{c}}, respectively. We have observed mixing of these AMROs just below T_{\text{c}} in the CDW phase. Observed features strongly suggest magnetic breakdown in reconstructed FSs. In fact, they are reproduced by a quantum-mechanical model on AMROs under weak periodic potential. The possibility of the unconventional CDW, in which the CDW gap has nodal points on the Fermi surface, is excluded in this compound.
- 2013-04-15
著者
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Osada Toshihito
Institute For Solid State Physics University Of Tokyo
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Uchida Kazuhito
Institute For Solid State Physics University Of Tokyo
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Konoike Takako
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Yamaguchi Ryu
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Kang Woun
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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